Anything to feed the German girl? (8)
I believe the answer is:
daughter
'girl?' is the definition.
('daughter' can be a synonym of 'girl')
'anything to feed the german' is the wordplay.
'anything' becomes 'aught' (I've seen this before).
'to feed' means one lot of letters goes inside another.
'the german' becomes 'der' ('the' in German).
'aught' inserted into 'der' is 'DAUGHTER'.
(Other definitions for daughter that I've seen before include "Relation" , "'''Don't put your ... on the stage, Mrs Worthington'' (Noel Coward) (8)'" , "The guard (anag.)" , "Family member" , "Close relative" .)